4 days ago · How to fix a P0303 code quickly and efficiently by addressing spark plugs, ignition coils, and more—discover the essential steps you need to take.

May 30, 2025 · The P0303 code indicates your 3 cylinder is misfiring. A misfire occurs when one of the cylinders inside of your engine doesn’t fire because something is off in the fuel-air-spark ratio.

Learn what the P0303 diagnostic trouble code means and how to troubleshoot a misfire in cylinder 3 of your engine with AutoZone.

Oct 6, 2025 · One prevalent code is P0303, a cylinder misfire indicator. Read on to learn the most common causes of a P0303 code, how it will affect your drive, and what you need to do to fix it.

Aug 25, 2024 · The P0303 code means that cylinder 3 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on …

Jan 1, 2026 · Step-by-step guide to accurately diagnose and repair the P0303 cylinder 3 engine misfire code.

Jan 18, 2025 · What does the P0303 Cylinder-3 Misfire Detected mean? P0303 code gets triggered when the Engine Control Module detects an engine misfire on cylinder-3. Misfire means that the …

Sep 4, 2024 · DTC P0303 signals a misfire in engine cylinder #3. Several possible causes include a faulty spark plug or spark plug wire, a bad ignition coil or oxygen sensor, or a vacuum leak.

Oct 22, 2024 · What does the P0303 – Cylinder 3 Misfire mean? The P0303 code refers to a specific issue in your vehicle’s engine. It indicates that there’s a misfire occurring specifically in cylinder …

Oct 30, 2024 · Here's everything you need to know if your engine is showing the P0303 error code, which indicates that the engine control module has identified a misfire in cylinder 3. Here are the …